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%I #9 Mar 30 2012 16:52:01
%S 1,1,3,7,19,56,180,596,2015,6904,23923,83755,296084,1056095,3797790,
%T 13757665,50164787,183980036,678215028,2511483176,9337575130,
%U 34840575458,130412367572,489546890178,1842438724560,6950471604901,26276784902865,99539079724648,377759500611913,1436093975018569,5468247624237042,20853026397347178
%N A bisection of A188624.
%Y Cf. A188624, A156043.
%K nonn
%O 1,3
%A _N. J. A. Sloane_, Apr 06 2011